Blast Gate For Nominal Duct Diameter 16 in Inlet Diameter 15-63/64 in Body Material Aluminum Overall Length 11 1/4 in Product Type Manual Blast Gate Weight 21.2 lb Maximum Pressure Rating 42 in wc Blade Material Galvanized Steel Maximum Temperature Rating 390 Degrees F Body Material Thickness 20 ga Overall Depth 11 1/4 in Overall Width 18 in Shape Rectangular Inside Diameter 16 in Color Silver Connection Type Clamp Together